Edge-Core ES4650 Uživatelský manuál stáhnout pdf (Strana 3)

Ethernet has been the dominating technology for LAN for

many years due to its simplicity and cost effectiveness.

However, at the WAN side is dominated by more

complicated, expensive, less bandwidth services such as

ATM, fixed lines, and leased lines. With the demand of

increasing services and bandwidth, business today are

looking for a solution that's simple to deploy and offering

enough bandwidth for their business needs. To fulfill the

needs of today's business operators are looking into MEN

(Metro Ethernet Network) technology to prepare for this

increase demand. By making this transition to MEN

technology, service providers can profit from lower

operating expense and gain additional service revenue

from this Ethernet all the way technology.

Edge-Core offers universal carrier-class access

network products for broadband multimedia services

including :

Metro Aggregation Switch

ąLow port density fiber Aggregation (ES4612)

ąMiddle port density fiber Aggregation (ES4624-SFP)

ąMiddle port density with 10G Fiber Aggregation

(ES4626-SFP)

Metro Access Switch

ąCopper Metro Access (ES3528)

ąFiber Metro Access (ES3528-WDM)

ąSFP Metro Access (ES3528M-SFP)

Metro Access CPE

ąMetro Access Media Converter (EC3802-WDM)

ąMetro Access Gateway (EC3805 / EC3805F)

The Edge-Core Metro Access products are suitable for

ąCurrent datacom equipment providers

ąProviders: private E-Line and E-LAN business services

and residential triple play services

And they are featured by the following benefits :

ąProvide different interfaces (Copper/Fiber) to fit Metro

market.

ąEnhanced QoS features for triple play application

ąVarious uplink interfaces and software features for

scalability

ąEnhanced redundancy from both software and

hardware

ąEnhanced management and deployment features to

help service providers

ąLower capital and operating expenditure than

traditional circuit switch

Edge-Core Metro Access Switch series are designed

to provide access at the consumer side and are

employed with two essential technologies :

œ!

IEEE 802.3ah Ethernet in the First Mile

The IEEE802.1ah Ethernet in the first mile has the

capabilities to detect, setting flags, loopback, and issue

critical events for the CPE. Unlike SNMP or ping, the

IEEE802.3ah standard doesn't require an IP address to

perform the necessary function that needs for an

operator to control the CPE.

Since the IEEE link-layer OAM is generally used over a

link between a service provider and a customer, it

defines two modes for OAM entities: active or passive.

The elements of the provider network (e.g. DSLAMs or

provider Ethernet switches) operate in active mode, and

can exert control over the passive-mode devices (e.g.

DSL modems or customer premises switches).

œ!

IEEE 802.1ad (Q-in-Q, stacked VLANs or Provider

Bridges)

The original concept of ethernet is to provide a minimal

installation effort in hubs, switch, by using flat network

architecture. This concept is fine within the LAN

network, but to offer different services using ethernet on

WAN, providers need someway to divide the network

into different networks for each user and services.

This is nothing new on LAN since enterprise need to use

VLANS to separate different access rights for

departments. Each VLAN is identified by a 802.1Q tag

which represents the logical partitioning of the network

to serve different department interests. This method is

an improvement from a flat network to a hierarchy

network.

To deliver more services to more end-users over a

shared Ethernet infrastructure that cover great distance,

service providers need to add a hierarchical view within

their IP network. But the traditional 802.1Q doesn't offer

enough VLANs. To solve this need for Metro Ethernet

Network, there are two standards to this hierarchical

method. The first is IEEE802.1ad Q-in-Q and the

second is IEEE802.1ah MAC-in-MAC. Q-in-Q extends

the original concept of VLANs to add a new Q tag that

allows the service provider to administrate their own

tags to identify individual customer networks while the

original Q tag identify within the customers network. This

helps the service to support a 3rd hierarchy for the

service provider to provide their services to all

customers.

In general, Q-in-Q function offers the following

benefits to the network:

ąExpands from 4096 VLAN ID to 40962

ąProvides easier network management

ąProvides better security along with a more cost-effective

solution

Metro Access Overview

01 02

Metro Access Solution Enterprise Switch Solution Broadband Wireless Access Wireless Solution

1 2 3 4 5 6 7 8 ... 23 24

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